Error and Artist picture

[Kihon]

Got this error several times.

MusicBee v3.1.6466.36486 (Win6.1), 6 Oct 2017 14:09:

System.ArgumentOutOfRangeException: Index was out of range. Must be non-negative and less than the size of the collection.
Parameter name: index
   at System.ThrowHelper.ThrowArgumentOutOfRangeException(ExceptionArgument argument, ExceptionResource resource)
   at #=q7dP_a4uPBVZ4ddSaO3Sybgj5UwTuig$7NMFW$S$zBcs=.#=qsNRbNUnLeyii1gB0dZPu2YwDOkKN8YsNgwZ9y8CXmLg=(Object #=qNA975iityFaJ4HZKdiYFZg==, EventArgs #=q5spzb1silEZXinWjnsIPTA==)
   at System.Windows.Forms.Control.OnClick(EventArgs e)
   at #=qnSbd9p8iRuyfT07ZE5PqcPkSxGdOhpyZBztVPctuvBo=.OnClick(EventArgs #=qtMw2z5n55mEaSy$DMDgXdg==)
   at System.Windows.Forms.Control.WmMouseUp(Message& m, MouseButtons button, Int32 clicks)
   at System.Windows.Forms.Control.WndProc(Message& m)
   at System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m)
   at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)
   at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)

I cannot see anyway of changing the Artist picture. Quite a few are incorrect.

[Steven]

someone else reported the same but i cant reproduce the error.
Can you describe in steps what you did, especially if you removed existing pictures first